Superhuman Software Engineer interview experience

The first day alone had four rounds, starting with a behavioral interview where I got specific, friendly questions, including something personal like asking for the manager’s first name. After that was a code review round with a follow-up question I struggled with even though it was still described as manageable. They asked me to prove the correctness of the algorithm, which made it feel more rigorous than typical “just implement” coding.

Then I had a system design round for a simple page with a number and an increment button. We covered data storage, API shape, and how to deal with network